The Ancient Origins of Both Light and Dark Skin

For a long time, both scientists and the general public assumed that skin color evolved to adapt to local conditions. While that idea hasn't been completely debunked, genetic research tells us skin color is a lot more complicated. Until recently just about all genetic research on skin color came from studies done on people of European descent. A new study, led by geneticist Sarah Tishkoff at the University of Pennsylvania, studied the genomes of over a thousand volunteers from ten ethnic...

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